1 EXHIBIT 11 The Geon Company Earnings Per Share (EPS) (In millions, except per share data) Three Months Ended Nine Months Ended September 30, September 30, ------------------- ------------------ 1998 1997 1998 1997 ---- ---- ---- ---- BASIC EARNINGS PER COMMON SHARE: Number of Shares: Average shares of common stock outstanding 23.4 23.2 23.3 23.4 Less: Average shares of contingently issuable restricted stock outstanding (0.4) (0.4) (0.4) (0.4) ------ ------ ------ ------ Total common shares outstanding for basic EPS 23.0 22.8 22.9 23.0 ====== ====== ====== ====== DILUTED EARNINGS PER COMMON SHARE: Number of Shares: Average shares of common stock outstanding 23.4 23.2 23.3 23.4 Net effect of dilutive stock options based on treasury stock method using average market price .2 .2 .3 .2 ------ ------ ------ ------ Total common and common equivalent shares outstanding for diluted EPS 23.6 23.4 23.6 23.6 ====== ====== ====== ====== Net income per share of common stock Basic $ .27 $ .47 .73 $ .83 ====== ====== ====== ====== Diluted $ .26 $ .45 .71 $ .81 ====== ====== ====== ======